Home | History | Annotate | Download | only in location 
      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.hardware.location;
     18 
     19 
     20 import android.annotation.SystemApi;
     21 import android.os.Parcel;
     22 import android.os.Parcelable;
     23 import android.util.Log;
     24 
     25 /**
     26  * @hide
     27  */
     28 @SystemApi
     29 public class NanoAppFilter {
     30 
     31     private static final String TAG = "NanoAppFilter";
     32 
     33     // The appId, can be set to APP_ID_ANY
     34     private long mAppId;
     35 
     36     // Version to filter apps
     37     private int mAppVersion;
     38 
     39     // filtering spec for version
     40     private int mVersionRestrictionMask;
     41 
     42     // If APP_ID is any, then a match is performef with the vendor mask
     43     private long mAppIdVendorMask;
     44 
     45     // Id of the context hub this instance is expected on
     46     // TODO: Provide an API which will let us change this HubId.
     47     private int mContextHubId = HUB_ANY;
     48 
     49     /**
     50      * Flag indicating any version. With this flag set, all versions shall match provided version.
     51      */
     52     public static final int FLAGS_VERSION_ANY = -1;
     53     /**
     54      * If this flag is set, only versions strictly greater than the version specified shall match.
     55      */
     56     public static final int FLAGS_VERSION_GREAT_THAN  = 2;
     57     /**
     58      * If this flag is set, only versions strictly less than the version specified shall match.
     59      */
     60     public static final int FLAGS_VERSION_LESS_THAN   = 4;
     61     /**
     62      * If this flag is set, only versions strictly equal to the
     63      * version specified shall match.
     64      */
     65     public static final int FLAGS_VERSION_STRICTLY_EQUAL = 8;
     66 
     67     /**
     68      * If this flag is set, only versions strictly equal to the version specified shall match.
     69      */
     70     public static final int APP_ANY = -1;
     71 
     72     /**
     73      * If this flag is set, all vendors shall match.
     74      */
     75     public static final int VENDOR_ANY = -1;
     76 
     77     /**
     78      * If this flag is set, any hub shall match.
     79      */
     80     public static final int HUB_ANY = -1;
     81 
     82     private NanoAppFilter(Parcel in) {
     83         mAppId = in.readLong();
     84         mAppVersion = in.readInt();
     85         mVersionRestrictionMask = in.readInt();
     86         mAppIdVendorMask = in.readInt();
     87     }
     88 
     89     public int describeContents() {
     90         return 0;
     91     }
     92 
     93     public void writeToParcel(Parcel out, int flags) {
     94 
     95         out.writeLong(mAppId);
     96         out.writeInt(mAppVersion);
     97         out.writeInt(mVersionRestrictionMask);
     98         out.writeLong(mAppIdVendorMask);
     99     }
    100 
    101     /**
    102      * Create a filter
    103      *
    104      * @param appId       application id
    105      * @param appVersion  application version
    106      * @param versionMask version
    107      * @param vendorMask  vendor
    108      */
    109     public NanoAppFilter(long appId, int appVersion, int versionMask, long vendorMask) {
    110         mAppId = appId;
    111         mAppVersion = appVersion;
    112         mVersionRestrictionMask = versionMask;
    113         mAppIdVendorMask = vendorMask;
    114     }
    115 
    116     private boolean versionsMatch(int versionRestrictionMask, int expected, int actual){
    117         // some refactoring of version restriction mask is needed, until then, return all
    118         return true;
    119     }
    120     /**
    121      * Test match method.
    122      *
    123      * @param info nano app instance info
    124      *
    125      * @return true if this is a match, false otherwise
    126      */
    127     public boolean testMatch(NanoAppInstanceInfo info) {
    128         return (mContextHubId == HUB_ANY || info.getContexthubId() == mContextHubId) &&
    129                 (mAppId == APP_ANY || info.getAppId() == mAppId) &&
    130                 (versionsMatch(mVersionRestrictionMask, mAppVersion, info.getAppVersion()));
    131     }
    132 
    133     public static final Parcelable.Creator<NanoAppFilter> CREATOR
    134             = new Parcelable.Creator<NanoAppFilter>() {
    135         public NanoAppFilter createFromParcel(Parcel in) {
    136             return new NanoAppFilter(in);
    137         }
    138 
    139         public NanoAppFilter[] newArray(int size) {
    140             return new NanoAppFilter[size];
    141         }
    142     };
    143 }
    144